#Back-to-top { text-align: center; z-index: 99999; position: fixed; bottom: 40px; right: 30px; cursor: pointer; display: none; opacity: 0.7; } 
#Back-to-top:hover { opacity: 1; } 
.table-download th, 
.table-download td{ border:1px dotted #cecece; padding-left:5px; padding-top:7px; padding-bottom:7px; }

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    padding-top: 10px;
    height: 0;
    overflow: hidden;
  }
   
  .video-container iframe, .video-container object, .video-container embed {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }